[MIPS] Build blast_cache routines from template

    
Build blast_xxx, blast_xxx_page, blast_xxx_page_indexed from template.
Easier to maintaina and saves 300 lines.  Generated code should be
unchanged.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>